deluge vs overwhelm

deluge is a noun but overwhelm is not a noun.

Word	Noun	Adjective	Verb	Adverb
deluge	Yes	No	Yes	No
overwhelm	No	No	Yes	No

As verbs, deluge and overwhelm are synonyms defined as:

Other synonyms of deluge include flood out.

deluge (noun)	overwhelm (noun)
a heavy rain
the rising of a body of water and its overflowing onto normally dry land
an overwhelming number or amount

deluge (verb)	overwhelm (verb)
fill or cover completely, usually with water	charge someone with too many tasks
charge someone with too many tasks	overcome by superior force
fill quickly beyond capacity; as with a liquid	cover completely or make imperceptible
	overcome, as with emotions or perceptual stimuli